Hi all, anyone know the twist rate of a 7 x 61 Shultz Larsen? Its the more recent model with the front lockers. Its my uncles rifle who lives in Taranaki and Iím putting together some loads with the A-Max 162 and would like 1:10 but according to KAC 1:11 is ok.Checked the Shultz Larsen site but its pretty crap with no info at all.

Definately try Dave, I think he even has a 7x61. Otherwise my Rem Mag had a 1:10 twist (M97DL). Stablised the a-max fine even though it is a bi slow. All else fails put a tight patch down the barrel and measure it yourself using your cleaning rod.

on a side note, what do you think of the cartridge and the shultz & larsen combo? Worked with an old boy who raved about it, reckons he could pump out a 162gr amax out of his S&L at close to 3100!Anyone own one?

What I can tell you about Schultz & Larsen is that the first 7x61 S&Hs were built in 1953.

The cartridge, designed by American Phil Sharpe, whose dream was of an 'Ackley-esque' 7mm magnum cartridge, with a straight case, sharp shoulder, and large powder capacity, was developed in partnership with Richard Hart.It was destined to become the first modern commercial 7mm magnum!

Norma of Sweden agreed to produce factory ammunition, and Schultz & Larsen of Denmark the rifles to chamber it.I cannot, however, tell you what the twist rate was... possibly 1-12"

The first rifles, based on the Danish Madsen 54 action, were built on the massive 54J action...†so solid was this action, that when Roy Weatherby designed his now discontinued .378Wby magnum, he initially built it on this action.

In fact, the now famous Mark V Weatherby incorporates many of the features of this action, as do the SAUER 200 and 202 rifles.[JP Sauer & Sohn also manufactured rifles of high quality for Weatherby.]

The rifle was re-designed for the American market in 1960, as the model 60, which I believe, had a 1-10" twist, as does the later model 65.

For any of the 7mmMagnums, 1-9.25" is now the standard twist, with a min. 24" bbl. reqd. to optimize velocities...

What model S&L are you loading for, as some take the 7x61 Sharp & Hart and others take the 7x61 Super.

The 7x61 'Super' has the same external dimensions as the 7x61 S&H... Norma redesigned the 7x61S&H internally only, to try to stay competitive with the 7mmRemMag and the 7mmWby Mag, which were starting to cut into 7x61 sales, with their higher velocities...

The two cartridges are interchangeable, but the loading data for the 'super' cannot be used for the S&H.

What model S&L are you loading for, as some take the 7x61 Sharp & Hart and others take the 7x61 Super.

The 7x61 'Super' has the same external dimensions as the 7x61 S&H... Norma redesigned the 7x61S&H internally only, to try to stay competitive with the 7mmRemMag and the 7mmWby Mag, which were starting to cut into 7x61 sales, with their higher velocities...

The two cartridges are interchangeable, but the loading data for the 'super' cannot be used for the S&H.

Holly crap ED you just alerted me to potential disaster THANKS!! Fortunatly the load data I used was for a SUPER so no need to pull things apart.

What model S&L are you loading for, as some take the 7x61 Sharp & Hart and others take the 7x61 Super.

The 7x61 'Super' has the same external dimensions as the 7x61 S&H... Norma redesigned the 7x61S&H internally only, to try to stay competitive with the 7mmRemMag and the 7mmWby Mag, which were starting to cut into 7x61 sales, with their higher velocities...

The two cartridges are interchangeable, but the loading data for the 'super' cannot be used for the S&H.

Holly crap ED you just alerted me to potential disaster THANKS!! Fortunatly the load data I used was for a SUPER so no need to pull things apart.

Cheers.

Mate, the "Super" is the later model that Norma upped the ante on a bit, so beware if you have already started with close to maximum loads for the Super...

If you have, I'd suggest you pull them and reduce the load by 5%... then work up a load to suit your rifle using care, and watching for the usual pressure signs such as bolt hard to open, flattened primers, cratered primers and expanded case heads...

I do not have any comparable loading data available for the two cases, esp with Rl.25...

I can only tell that the burn rate of Rl.25 is about the same as Retumbo, AR2225 or Vihtavuori 24N29...

I had a 7x61S&H on a howa action for a while; another forum member has it now. Nice round, I was getting ~3050fps with 60gr AR2209 from the A-Max. New brass could be got from C.R.Pain. Much less hassle than forming brass from 7mm RemMag...

I have a 1961 S&L M65DL, and it has 1:12 twist, but I have seen a 1:10 twist on the same model rifle. I understand the later model M68 had 1:10, so I would be very surprised if your barrel has slower twist than 1:10

Phil Sharpe tested the M60 with various twists, when he developed the cartridge/rifle. He got good accuracy at long range with 1:12 and 154gr projectiles, and he probably did not demand accuracy at 1200 yards, like todays superstars. I think 1:10 with 154gr to 160gr will turn out to be more than good enough for very long range hunting. This rifle is famous for accuracy. I am about to do some tests, so I will report back in a couple of months.